Non-Visual Lighting Environment in Buildings

Daylight plays an important role in achieving energy savings and visual comfort in buildings. It conforms to human circadian rhythms and provides the best visual conditions in the work environment and residential buildings. Due to the dynamics of life in today's modern society, people are spending more and more time indoors. As a result, we are exposed to less and less time directly in daylight. This is true depending on the appropriateness of the indoor lighting environment. The diversity of geometric properties of the space, but also the optical properties of building materials significantly complicate the simplified view of the evaluation of the circadian potential in buildings. This fact points to the fact that not only the quantity but also the quality (i.e., colour spectrum of light) of the indoor light environment needs to be properly addressed